Novel 2-amino benzimidazole derivatives and their use as modulators of small-conductance calcium-activated potassium channels

A 2-amino benzimidazole derivative of Formula Ia:

• or any of its isomers or any mixture of its isomers,
• or a pharmaceutically acceptable salt thereof, wherein
• m is 0, 1 or 2;
• n is 0, 1 or 2;
• R′ is hydrogen or alkyl;
• R1 and R2 independent of each other represent a phenyl group, which phenyl group is optionally substituted with one or more substituents independently selected from the group consisting of:
• halo, trifluoromethyl, trifluoromethoxy, cyano, alkyl, RaRbN— and RaRbN-alkyl;
• wherein Ra and Rb independent of each other are hydrogen or alkyl;
• and
• R4, R5, R6 and R7 independent of each other are selected from the group consisting of:
• hydrogen, halo, trifluoromethyl, trifluoromethoxy, cyano, alkyl and alkoxy.